Erdelský, AndrejMonteiro, Alexandre2025-10-072025-10-072025-10-07https://hdl.handle.net/2077/89837This thesis explores the design of cooperative multiplayer sandbox games that foster community-centered engagement and appeal to a broad demographic of players. In collaboration with FunRock & Prey Studios, the research focuses on identifying key mechanics that encourage the formation of organic role hierarchies within player groups, without explicit direction from the game. By combining theoretical analysis with an iterative design and playtesting process, a functional prototype was developed to observe and evaluate player behavior in a large-scale cooperative environment. The study draws from game design theory, psychology of player motivation, community dynamics, and empirical playtest feedback to develop design guidelines that balance complexity, accessibility, and player agency. Findings reveal that ambiguous mechanics, interdependent gameplay systems, synchronizable player tasks, diverse mechanical complexity, and scalable role structures are critical to promoting emergent leadership, group cooperation, and engagement across casual and hardcore players alike. The resulting insights contribute to both academic research and industry practice in the design of socially driven multiplayer games.engGame DesignMultiplayer SandboxCommunity EngagementRole HierarchiesEmergent BehaviourCasual and Hardcore Playerstext